I don't see a way to embed any of the videos here, so I'll send you straight to the source instead. I've only watched Viswanathan Anand's "master class" so far, and liked seeing him discuss his amazing game with Evgeny Bareev from Wijk aan Zee in 2004. There's a spectacular variation that could have arisen had Bareev played 27...Qf4, and I was rather pleased with myself to have worked it out with a computer shortly after the game was played. When I learned a few hours later that Anand had seen the variation (or at least most of it) over the board, well, that was jaw-dropping. If you don't already know about this game and the variation in question, do check out that video.